Share 'How do I respond to this? ("It didn't 'just happen!")'

Posted this on Facebook with the text "No one can read that and not think that science is friggin' awesome," and got the following as a response. I don't know how to respond to this respectfully but informatively (I'm new at this) but I feel like I absolutely have to because this person frequently takes advantage of the "I'm a Christian so I can tell you EXACTLY how I feel but since you're an ath…